Advances in fibre-based & integrated photonic systems
Event details
| Date | 03.10.2025 |
| Hour | 15:00 › 17:00 |
| Speaker | Assoc. Prof. Qian Li (School of Electronic and Computer Engineering, Shenzhen Graduate School, China); Assoc. Prof. Hongyan Fu (Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, China) |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract
High-performance ultrafast mode-locked fiber lasers with strong environmental stability remain a central focus of both academia and industry, driven by their broad spectrum of applications. This talk presents recent advances in all-polarization-maintaining (all-PM) mode-locked fiber lasers and emphasizes strategies for noise suppression. We demonstrate a novel mode-locking scheme implemented in all-PM linear-cavity configurations that simultaneously delivers ~100 fs pulses, ultralow-noise operation with 0.01% integrated relative intensity noise and 50 fs timing jitter, and long-term environmental stability with 0.1% RMS power fluctuation. The presentation systematically analyzes noise generation mechanisms, introduces advanced diagnostic methodologies, and proposes effective suppression techniques. Our findings reveal that all-PM linear-cavity architectures incorporating specialized “optical cube” designs can significantly suppress multiple noise sources and markedly improve overall laser performance. These results establish a robust technological foundation for next-generation compact, high-stability ultrafast laser systems, with promising applications in optical frequency combs, quantum information processing, and precision metrology.
While fiber-based systems excel in noise control and stability for high-precision applications, a parallel revolution is underway in the domain of integrated photonic systems—spearheaded by vertical cavity surface emitting lasers (VCSELs). Recent advancements in VCSELs have revolutionized the fields of optical communications and sensing, leading to breakthroughs in short-reach high-speed data transmission and precise 3D sensing technologies. These innovations, primarily driven by tunable VCSELs have paved the way for highly integrated systems in both commercial and industrial applications. The talk collectively highlights the diverse applications and technological advancements enabled by VCSELs across various optical communication and sensing systems. This talk explores the implementation of VCSELs in enhancing data transmission rates, improving beam-steering capabilities, and sensing accuracy in systems ranging from indoor wireless communications and LiDAR to device-to-device and Internet of Things (IoT) networks. Studies demonstrate how VCSEL technology contributes to increasing the efficiency, resolution, and reliability of optical systems. This talk explains why VCSEL technology is becoming a cornerstone for future developments in short-reach high-speed communication and precise optical sensing.
Biography
H. Y. Fu is currently a tenured-associate professor, deputy director of Research Office, and director of Nano-fabrication Platform, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China. He received the B.S. degree in electronic and information engineering from Zhejiang University and the M.S. degree in electrical engineering with specialty in photonics from Royal Institute of Technology (KTH), Sweden, and the Ph.D. degree from the Department of Electrical Engineering from Hong Kong Polytechnic University. His research focuses on integrated photonics and its related applications in communications and sensing, including optical wireless communication and LiDAR. From 2005 to 2010, he was a research assistant and then research associate with Photonic Research Center, the Hong Kong Polytechnic University. From 2010 to 2017, Dr. Fu was a founding member and leading the advanced optic communications research at Central Research Institute, Huawei. He was the project manager of All-Optical Networks (AON), which was evolved to a company-wide flagship research project that covers whole aspects of next generation optical communication technologies to guarantee Huawei’s leading position. He is a senior member of IEEE, Optica and life member of SPIE. He is the founding advisors of Optica/IEEE Photonics Society/SPIE Student Chapters at Tsinghua SIGS, Tsinghua University. He serves as the associate editor of Frontiers in Photonics and reviewers for Nature, Science, etc. He has authored/coauthored over 350 journal or conference papers, 3 book chapters, over 80 granted/pending China /Europe/Japan/ US patents.
Qian Li is currently a tenured-associate professor, the vice dean of the School of Electronic and Computer Engineering (ECE), Peking University Shenzhen Graduate School. She received the Bachelor degree from Zhejiang University, Hangzhou, China, in 2003, the Master degree from the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2005, and the Ph.D. degree from the Hong Kong Polytechnic University, Hong Kong, in 2009. After graduation she was a Visiting Scholar at the University of Washington, Seattle and Postdoctoral Fellow at the Hong Kong Polytechnic University. In 2012 she joined School of Electronic and Computer Engineering (ECE) in Peking University as an Assistant professor. Since 2013 she is Associate Professor at ECE. Her research interests include ultrafast optics, nonlinear optics and integrated optics. Dr. Li is senior members of Institute of Electrical and Electronics Engineers (IEEE) and senior member of Optica. From March 2017 to April 2019, she is Vice Chair of IEEE ED/SSC Beijing Section (Shenzhen) Chapter and Chair for EDS. From 2015 she is an advisor of Optica Student Chapter in Peking University Shenzhen Graduate School. From 2019 she is an advisor of Peking University Shenzhen Graduate School IEEE Photonics Society Student Branch Chapter. Dr. Li has published over 160 SCI/EI-indexed papers, and most of them are in well-known journals and conferences, including Nature Communications, Laser & Photonics Reviews, Journal of Lightwave Technology, Optics Letters, Optics Express, Photonics Research. In addition, Dr. Li has co-authored an invited technical review paper in Nature, 2 book chapters and 3 review papers.
High-performance ultrafast mode-locked fiber lasers with strong environmental stability remain a central focus of both academia and industry, driven by their broad spectrum of applications. This talk presents recent advances in all-polarization-maintaining (all-PM) mode-locked fiber lasers and emphasizes strategies for noise suppression. We demonstrate a novel mode-locking scheme implemented in all-PM linear-cavity configurations that simultaneously delivers ~100 fs pulses, ultralow-noise operation with 0.01% integrated relative intensity noise and 50 fs timing jitter, and long-term environmental stability with 0.1% RMS power fluctuation. The presentation systematically analyzes noise generation mechanisms, introduces advanced diagnostic methodologies, and proposes effective suppression techniques. Our findings reveal that all-PM linear-cavity architectures incorporating specialized “optical cube” designs can significantly suppress multiple noise sources and markedly improve overall laser performance. These results establish a robust technological foundation for next-generation compact, high-stability ultrafast laser systems, with promising applications in optical frequency combs, quantum information processing, and precision metrology.
While fiber-based systems excel in noise control and stability for high-precision applications, a parallel revolution is underway in the domain of integrated photonic systems—spearheaded by vertical cavity surface emitting lasers (VCSELs). Recent advancements in VCSELs have revolutionized the fields of optical communications and sensing, leading to breakthroughs in short-reach high-speed data transmission and precise 3D sensing technologies. These innovations, primarily driven by tunable VCSELs have paved the way for highly integrated systems in both commercial and industrial applications. The talk collectively highlights the diverse applications and technological advancements enabled by VCSELs across various optical communication and sensing systems. This talk explores the implementation of VCSELs in enhancing data transmission rates, improving beam-steering capabilities, and sensing accuracy in systems ranging from indoor wireless communications and LiDAR to device-to-device and Internet of Things (IoT) networks. Studies demonstrate how VCSEL technology contributes to increasing the efficiency, resolution, and reliability of optical systems. This talk explains why VCSEL technology is becoming a cornerstone for future developments in short-reach high-speed communication and precise optical sensing.
Biography
H. Y. Fu is currently a tenured-associate professor, deputy director of Research Office, and director of Nano-fabrication Platform, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China. He received the B.S. degree in electronic and information engineering from Zhejiang University and the M.S. degree in electrical engineering with specialty in photonics from Royal Institute of Technology (KTH), Sweden, and the Ph.D. degree from the Department of Electrical Engineering from Hong Kong Polytechnic University. His research focuses on integrated photonics and its related applications in communications and sensing, including optical wireless communication and LiDAR. From 2005 to 2010, he was a research assistant and then research associate with Photonic Research Center, the Hong Kong Polytechnic University. From 2010 to 2017, Dr. Fu was a founding member and leading the advanced optic communications research at Central Research Institute, Huawei. He was the project manager of All-Optical Networks (AON), which was evolved to a company-wide flagship research project that covers whole aspects of next generation optical communication technologies to guarantee Huawei’s leading position. He is a senior member of IEEE, Optica and life member of SPIE. He is the founding advisors of Optica/IEEE Photonics Society/SPIE Student Chapters at Tsinghua SIGS, Tsinghua University. He serves as the associate editor of Frontiers in Photonics and reviewers for Nature, Science, etc. He has authored/coauthored over 350 journal or conference papers, 3 book chapters, over 80 granted/pending China /Europe/Japan/ US patents.
Qian Li is currently a tenured-associate professor, the vice dean of the School of Electronic and Computer Engineering (ECE), Peking University Shenzhen Graduate School. She received the Bachelor degree from Zhejiang University, Hangzhou, China, in 2003, the Master degree from the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2005, and the Ph.D. degree from the Hong Kong Polytechnic University, Hong Kong, in 2009. After graduation she was a Visiting Scholar at the University of Washington, Seattle and Postdoctoral Fellow at the Hong Kong Polytechnic University. In 2012 she joined School of Electronic and Computer Engineering (ECE) in Peking University as an Assistant professor. Since 2013 she is Associate Professor at ECE. Her research interests include ultrafast optics, nonlinear optics and integrated optics. Dr. Li is senior members of Institute of Electrical and Electronics Engineers (IEEE) and senior member of Optica. From March 2017 to April 2019, she is Vice Chair of IEEE ED/SSC Beijing Section (Shenzhen) Chapter and Chair for EDS. From 2015 she is an advisor of Optica Student Chapter in Peking University Shenzhen Graduate School. From 2019 she is an advisor of Peking University Shenzhen Graduate School IEEE Photonics Society Student Branch Chapter. Dr. Li has published over 160 SCI/EI-indexed papers, and most of them are in well-known journals and conferences, including Nature Communications, Laser & Photonics Reviews, Journal of Lightwave Technology, Optics Letters, Optics Express, Photonics Research. In addition, Dr. Li has co-authored an invited technical review paper in Nature, 2 book chapters and 3 review papers.
Practical information
- General public
- Free
Organizer
- Dr. Jiaye Wu